Ultrasonic vibration-assisted single point incremental forming of hemispherical shape using multi-stage forming strategy

2020 ◽  
Vol 13 (3) ◽  
pp. 247
Author(s):  
Kaushik M. Patel ◽  
Bharat A. Modi ◽  
Ashish M. Gohil
Keyword(s):  
Ultrasonic Vibration ◽  
Incremental Forming ◽  
Single Point ◽  
Single Point Incremental Forming ◽  
Multi Stage ◽  
Forming Strategy

Thickness Distribution and Forming Strategy Analysis for Two Point Incremental Forming with a Male Die

2011 ◽  
Vol 337 ◽  
pp. 452-455 ◽  
Author(s):  
Zhao Bing Liu ◽  
Paul Meehan ◽  
Paul Bellette
Keyword(s):  
Incremental Forming ◽  
Low Cost ◽  
Thickness Distribution ◽  
Single Point ◽  
Three Dimensional ◽  
Dimensional Accuracy ◽  
Strategy Analysis ◽  
Multi Stage ◽  
Analytical Perspective ◽  
Forming Strategy

Incremental Sheet Forming (ISF) is a promising sheet-metal-forming technology which is drawing more and more researchers’ attention due to its flexibility of manufacturing three-dimensional products at a relatively low cost for rapid prototyping and small-batch production. This paper is focused on the thickness distribution and the forming strategy analysis for two point incremental forming with a male die. The analyzed benchmark is half a torus which is generated by revolving a semi-circle. Such a part is hardly able to be formed by single point incremental forming because its slope varies from 0 degree to 90 degrees. In terms of the varying slope, the variant of sine’s law is derived to give an approximate prediction of the thickness distribution from an analytical perspective. In addition, a multi-stage forming strategy is proposed in order to form the part successfully. In particular, a keying operation is implemented carefully in order to avoid twist phenomenon and achieve good dimensional accuracy.

Multi Stage Strategies for Single Point Incremental Forming of a Cup

2008 ◽  
Vol 1 (S1) ◽  
pp. 1199-1202 ◽  
Author(s):  
M. Skjoedt ◽  
N. Bay ◽  
B. Endelt ◽  
G. Ingarao
Keyword(s):  
Incremental Forming ◽  
Single Point ◽  
Single Point Incremental Forming ◽  
Multi Stage

scholarly journals Influences of Vibration Parameters on Formability of 1060 Aluminum Sheet Processed by Ultrasonic Vibration-Assisted Single Point Incremental Forming

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Mingshun Yang ◽  
Lang Bai ◽  
Yan Li ◽  
Qilong Yuan
Keyword(s):  
Ultrasonic Vibration ◽  
Incremental Forming ◽  
Single Point ◽  
Aluminum Sheet ◽  
Forming Limit ◽  
Single Point Incremental Forming ◽  
Experimental Platform ◽  
Formed Part ◽  
Vibration Parameters ◽  
Forming Angle

With increasing design complexities of thin-walled parts, the requirement of enhanced formability has impeded the development of the single point incremental forming (SPIF) process. In the present research, the ultrasonic vibration-assisted single point incremental forming (UV-SPIF) method was introduced to increase the formability of sheet metals. AL1060 aluminum alloy was adopted as the experimental material, and a truncated cone part was considered as the research object. The simulation model of UV-SPIF was established to analyze the distribution of plastic strains in the formed part. A forming angle was selected as the measuring index of formability of the aluminum sheet, and the influences of different vibration parameters on formability were evaluated. An experimental platform was devised to verify the accuracy of the obtained simulation results. It was found that ultrasonic vibration effectively improved the forming limit of the sheet. When the amplitude was 6 µm and the frequency was 25 kHz, the sheet yielded the best formability with the largest forming angle of 67 degrees.

scholarly journals Modeling and Analysis of Single Point Incremental Forming Force with Static Pressure Support and Ultrasonic Vibration

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1899
Author(s):  
Lang Bai ◽  
Yan Li ◽  
Mingshun Yang ◽  
Yunbo Lin ◽  
Qilong Yuan ◽  
...  
Keyword(s):  
Analytical Model ◽  
Ultrasonic Vibration ◽  
Pressure Support ◽  
Static Pressure ◽  
Incremental Forming ◽  
Single Point ◽  
Test System ◽  
Single Point Incremental Forming ◽  
Forming Force ◽  
Modeling And Analysis

In order to solve the problem of low accuracy caused by instability and springback during the single point incremental forming (SPIF) process, static pressure support (SPS) and ultrasonic vibration (UV) are introduced into the technology for auxiliary forming. In order to qualitatively and quantitatively study the mechanism of static pressure support–ultrasonic vibration-single point incremental forming (SPS-UV-SPIF) force, a typical truncated cone is used as the research object. The working principle and motion rules of the technology are analyzed. The sheet micro-element of the sidewall area is taken as an analysis object. The spatial stress balance equation of the sheet is constructed. The various stresses are integrated and calculated. The forces in each area of the sheet are analyzed and modeled. Finally, an analytical model for SPS-UV-SPIF force is established. The influence law of the static pressure parameter and the vibration parameter on the forming force is obtained. The corresponding SPS system and UV system are designed. The Kistler forming force test system is built. The experimental results are consistent with the theoretical analysis results, which verifies the correctness of the analytical model.

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